F5 Ethernet trailer decoder

Paste the F5 Ethernet trailer that a BIG-IP appends to packets captured with the tcpdump noise flags, and get each field explained: direction, slot and TMM, the virtual server, flow and peer identifiers, and the device's own RST cause. It detects a TLS provider section and deliberately decodes none of it, because from v15 that section carries session secrets. Local and offline.